Alloy for arc-welding.



. affected by the current that arc, enough UNITED STATES PATENT OFFICE.

jnavm n. wnsoN, or rA'rEnsoN,

rrr'rsnunon, PENNSYLVANIA;

NEW JERSEY, AND SANSOM M. RODGERS, ,OF SAID RODGERS ASSIGNOR T0 SAID WILSON.

ALLOY non ARC-WELDING.

No Drawing. Application as June is, 1915, Serial No. 34,4011.

for an electric welding electrode consisting of a base metal and a strength giving ingredient having such a relation to the are employed as to result in a retention of a substantial amount .of the ingredient the welded joint after being transferred thereto across the arc.

In electric welding, it has been found that steels employed as electrodes from which metal is transferred to the, work, are so the final weld lacks the desirable quality of ductility, strength and toughness.

One of the objects of our invention is -an alloy that overcomes these difliculties and provides a weld that retains the ductility, stren h and toughness required for successfully joining, repairing or otherwise treating boiler plate or other pieces of work so that the weld has characteristics making it substantially as tough and ductile as the rest of the work. f Our alloy consists preferably of steel or iron containing a comparatively large percentage of manganese; that is such an amount that after passing across a given is left in the weld to give the degree of toughness and ductility described.

Manganese in some quantities is common in steel and has been used in welding heretofore. But we believe that we are the dis coverers that an excess of manganese in the electrode over that burnedv upinthe arc has the effect of preserving strength characteristics thatare otherwise lost.

Our invention relates also to methods of using the aforesaid alloy.-

Heretofore v alloys and electrodes have been used for welding containing manganese in small proportions in connection with a hot burning are that burned the manganese out and soburned the iron as to weaken it.

When welding metal is transferred across an arc, the are exerts a destructive effect.-

Specification of Letters 2mm.

Patented June13, 1916.

I Renewed Kay 10, 1916. Serial No. 96,539.

sumed. If manganese is present it is s1m1- larly affected. The base metal itself, be it iron or any other welding metal adapted to make a'weld in repairing or joining a metal or metals, is injuriously affected. a

If enough manganese is present in the alloy, with carbon, the manganese diminishes the extent of the oxidation of the carbon. Heretofore when "steel alloys have been-used for arc welding containing these ingredients, their small amount, and the use'of them caused their elimination in the arc. The negligible quantities of the ingredients' as well as the hot arc, were responsible for this result. By increasin the quantities of the ingredients the we ding metal is protected from burning and the welded jomt retains the characteristics of iluctility and toughness that are otherwise ost.

Carbon appears to be more rapidly eliminated than manganese, and the use of manganese provides a weld that is'tougher than possible with carbon alone. Manga-.

nese is more effective than carbon in protecting the welding metal from burning in the arc. Manganese has been used in fluxes but fluxes injure rather than improve welds.

Any ingredient that has one or more of these beneficial manganese characteristics is an equivalent for manganese.

Any weldin metal adapted to make a weldingjoint etween parts of any one or more metals, homogeneously combined with one or more ingredients having the 'eifect of manganese on an iron weld, lies within the scope of our invention.

Our alloy may for example be composed of iron. combined with some 1.00% inanganese and if desired 18% carbon. These percentages are by no means absolute but are merely an illustration of the embodiment of our invention. The manganese may for an are having a temperature such as will transfer the alloy in a plastic condition be as low .as 50% and from there it may run up to 1.50% or more without losing the advantages of the use of manganese in the afore-mentioned alloy. And the carbon may if desired, be varied correspondingly.

Heretofore alloys have been proposed hav- Any carbon present is almost entirely coni invention to vary the carbon and the manganese or vary their proportions to each other without departing from the substance of our invention, provided they bearthe necessary relation to the arc temperature employed.

While defining manganese as an element of our alloy we do not limit our invention to that metal for any other metal which is the substantial equivalent of manganese for the purpose stated may be substituted.

The burnin quality of the arc, and the various imper ections in the weld do not destroy the usefulness of the weld, since in spite of such defects, it is useful for purposes where full strength qualities are not essential.

Our invention aims to extend the range of usefulness of arc welding.

What we claim is 1. An alloy for electric welding with an are which is composed of iron homogeneously combined with manganese in such substantial proportions as will retain in the welded joint a substantial degree of strength and ductility.

2. An alloy for electric arc welding of iron homogeneously combined with manganese in such substantial proportions as to provide the degree of tensile strength and ductilityin steel having boiler plate characteristics, and an additional amount to com pensate for that lost in the transfer across the arc.

3. .An electrode for electric welding composed of a homogeneous alloy of iron, and manganese in excess of 50%.

4. A metal electrode for arc welding of metals iconsisting of a homogeneous alloy containing a welding metal and an ingredient havin manganese characteristics to revent the urning of said 'welding meta in the arc.

5. An electrode for arc welding of metals consistin of a homogeneous allog' of a suitable wel ing metal therefor, an an ingredient having manganese characteristics of preventing burning of saidwelding metal and provlded a toughness in the weld 1n excess of that which is natural to said weld ing metal without said ingredient.

6. The method of electric welding which consists of transferring across an are from an electrode, welding material containing an ingredient having a characteristic of manganese to prevent burning substantially in excess of the amount lost in the arc.

7. The method of electric welding which consists of transferring across an arc, in a plastic state, from an electrode, welding metal containing an ingredient having a relation to the welding metal similar to that which manganese bears with respect to iron to prevent burning substantially 1n excess of the amount lost in the are.

8. The method of electric welding which consists of the transfer across an arc of a welding metal from an electrode having an ingredient possessing a relation to the welding metal similar to that which manganese bears with respect to iron, of such proportions as adds substantially to the toughness of the weld.

9. An electrode for electric arc welding composed of a homogeneous alloy of iron and of manganese in excess of 50% an 18% carbon. I

10. An electrodefor electric arc weldin composed of a homogeneous alloy combined with such an excess of man anese as will be transferred across the wel ing arc and be left in the welded joint to add substantially to its toughness. I

11. An electrode for electric arc welding which consists of ironcombined with an amount of manganese substantially in QXCGS of the amount lost during the transfer across said are.

12. An electrode for electric arc wel with an arc temperature near the critic f point for said alloy comgosed of an allo iron and of manganese om .5%up m e setive proportions and above 18% carbon or thereabout.

consists of iron combined with an amount of' manganese substantially in excess of the,

amount lost during the transfer acrow said are.

Signed at New York, in the coun of New York and State of New York, this 11 day of June, A. D. 1915.

DAVID H. WILSON. SANSOM' M. RODGERS. Witnesses:

MYRON- F. HILL, V A. L. Tmvrs. 

